/******************************************************************************
 *
 *  Copyright 1999-2012 Broadcom Corporation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at:
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 ******************************************************************************/

/****************************************************************************
 *
 *  This file contains definitions for the RFCOMM protocol
 *
 ****************************************************************************/

#ifndef RFCDEFS_H
#define RFCDEFS_H

#define PORT_MAX_RFC_PORTS 31

/*
 *  If nothing is negotiated MTU should be 127
*/
#define RFCOMM_DEFAULT_MTU 127

/*
 * Define used by RFCOMM TS frame types
*/
#define RFCOMM_SABME 0x2F
#define RFCOMM_UA 0x63
#define RFCOMM_DM 0x0F
#define RFCOMM_DISC 0x43
#define RFCOMM_UIH 0xEF

/*
 * Defenitions for the TS control frames
*/
#define RFCOMM_CTRL_FRAME_LEN 3
#define RFCOMM_MIN_OFFSET 5 /* ctrl 2 , len 1 or 2 bytes, credit 1 byte */
#define RFCOMM_DATA_OVERHEAD (RFCOMM_MIN_OFFSET + 1) /* add 1 for checksum */

#define RFCOMM_EA 1
#define RFCOMM_EA_MASK 0x01
#define RFCOMM_CR_MASK 0x02
#define RFCOMM_SHIFT_CR 1
#define RFCOMM_SHIFT_DLCI 2
#define RFCOMM_SHIFT_DLCI2 6
#define RFCOMM_PF 0x10
#define RFCOMM_PF_MASK 0x10
#define RFCOMM_PF_OFFSET 4
#define RFCOMM_SHIFT_LENGTH1 1
#define RFCOMM_SHIFT_LENGTH2 7
#define RFCOMM_SHIFT_MX_CTRL_TYPE 2

#define RFCOMM_INITIATOR_CMD 1
#define RFCOMM_INITIATOR_RSP 0
#define RFCOMM_RESPONDER_CMD 0
#define RFCOMM_RESPONDER_RSP 1

#define RFCOMM_PARSE_CTRL_FIELD(ea, cr, dlci, p_data)       \
  {                                                         \
    (ea) = *(p_data)&RFCOMM_EA;                             \
    (cr) = (*(p_data)&RFCOMM_CR_MASK) >> RFCOMM_SHIFT_CR;   \
    (dlci) = *(p_data)++ >> RFCOMM_SHIFT_DLCI;              \
    if (!(ea)) (dlci) += *(p_data)++ << RFCOMM_SHIFT_DLCI2; \
  }

#define RFCOMM_FORMAT_CTRL_FIELD(p_data, ea, cr, dlci) \
  (*(p_data)++ = (ea) | (cr) | ((dlci) << RFCOMM_SHIFT_DLCI))

#define RFCOMM_PARSE_TYPE_FIELD(type, pf, p_data)              \
  {                                                            \
    (type) = *(p_data) & ~RFCOMM_PF_MASK;                      \
    (pf) = (*(p_data)++ & RFCOMM_PF_MASK) >> RFCOMM_PF_OFFSET; \
  }

#define RFCOMM_FORMAT_TYPE_FIELD(p_data, type, pf)             \
  *(p_data)++ = ((type) | ((pf) << RFCOMM_PF_OFFSET)) {        \
    (type) = *(p_data) & ~RFCOMM_PF_MASK;                      \
    (pf) = (*(p_data)++ & RFCOMM_PF_MASK) >> RFCOMM_PF_OFFSET; \
  }

#define RFCOMM_PARSE_LEN_FIELD(ea, length, p_data)                \
  {                                                               \
    (ea) = (*(p_data)&RFCOMM_EA);                                 \
    (length) = (*(p_data)++ >> RFCOMM_SHIFT_LENGTH1);             \
    if (!(ea)) (length) += (*(p_data)++ << RFCOMM_SHIFT_LENGTH2); \
  }

#define RFCOMM_FRAME_IS_CMD(initiator, cr) \
  (((initiator) && !(cr)) || (!(initiator) && (cr)))

#define RFCOMM_FRAME_IS_RSP(initiator, cr) \
  (((initiator) && (cr)) || (!(initiator) && !(cr)))

#define RFCOMM_CR(initiator, is_command) \
  ((((initiator) && (is_command)) || (!(initiator) && !(is_command))) << 1)

#define RFCOMM_I_CR(is_command) ((is_command) ? 0x02 : 0x00)

#define RFCOMM_MAX_DLCI 61

#define RFCOMM_VALID_DLCI(dlci) \
  (((dlci) == 0) || (((dlci) >= 2) && ((dlci) <= RFCOMM_MAX_DLCI)))

/* Port Negotiation (PN) */
#define RFCOMM_PN_DLCI_MASK 0x3F

#define RFCOMM_PN_FRAM_TYPE_UIH 0x00
#define RFCOMM_PN_FRAME_TYPE_MASK 0x0F

#define RFCOMM_PN_CONV_LAYER_MASK 0xF0
#define RFCOMM_PN_CONV_LAYER_TYPE_1 0
#define RFCOMM_PN_CONV_LAYER_CBFC_I 0xF0
#define RFCOMM_PN_CONV_LAYER_CBFC_R 0xE0

#define RFCOMM_PN_PRIORITY_MASK 0x3F
#define RFCOMM_PN_PRIORITY_0 0

#define RFCOMM_PN_K_MASK 0x07

#define RFCOMM_T1_DSEC 0 /* None negotiable in RFCOMM */
#define RFCOMM_N2 0      /* Number of retransmissions */
#define RFCOMM_K 0       /* Window size */
#define RFCOMM_K_MAX 7   /* Max value of K for credit based flow control */

#define RFCOMM_MSC_FC 0x02  /* Flow control*/
#define RFCOMM_MSC_RTC 0x04 /* Ready to communicate*/
#define RFCOMM_MSC_RTR 0x08 /* Ready to receive*/
#define RFCOMM_MSC_IC 0x40  /* Incomming call indicator*/
#define RFCOMM_MSC_DV 0x80  /* Data Valid*/

#define RFCOMM_MSC_SHIFT_BREAK 4
#define RFCOMM_MSC_BREAK_MASK 0xF0
#define RFCOMM_MSC_BREAK_PRESENT_MASK 0x02

#define RFCOMM_BAUD_RATE_2400 0x00
#define RFCOMM_BAUD_RATE_4800 0x01
#define RFCOMM_BAUD_RATE_7200 0x02
#define RFCOMM_BAUD_RATE_9600 0x03
#define RFCOMM_BAUD_RATE_19200 0x04
#define RFCOMM_BAUD_RATE_38400 0x05
#define RFCOMM_BAUD_RATE_57600 0x06
#define RFCOMM_BAUD_RATE_115200 0x07
#define RFCOMM_BAUD_RATE_230400 0x08

#define RFCOMM_5_BITS 0x00
#define RFCOMM_6_BITS 0x01
#define RFCOMM_7_BITS 0x02
#define RFCOMM_8_BITS 0x03

#define RFCOMM_RPN_BITS_MASK 0x03
#define RFCOMM_RPN_BITS_SHIFT 0

#define RFCOMM_ONESTOPBIT 0x00
#define RFCOMM_ONE5STOPBITS 0x01

#define RFCOMM_RPN_STOP_BITS_MASK 0x01
#define RFCOMM_RPN_STOP_BITS_SHIFT 2

#define RFCOMM_PARITY_NO 0x00
#define RFCOMM_PARITY_YES 0x01
#define RFCOMM_RPN_PARITY_MASK 0x01
#define RFCOMM_RPN_PARITY_SHIFT 3

#define RFCOMM_ODD_PARITY 0x00
#define RFCOMM_EVEN_PARITY 0x01
#define RFCOMM_MARK_PARITY 0x02
#define RFCOMM_SPACE_PARITY 0x03

#define RFCOMM_RPN_PARITY_TYPE_MASK 0x03
#define RFCOMM_RPN_PARITY_TYPE_SHIFT 4

#define RFCOMM_FC_OFF 0x00
#define RFCOMM_FC_XONXOFF_ON_INPUT 0x01
#define RFCOMM_FC_XONXOFF_ON_OUTPUT 0x02
#define RFCOMM_FC_RTR_ON_INPUT 0x04
#define RFCOMM_FC_RTR_ON_OUTPUT 0x08
#define RFCOMM_FC_RTC_ON_INPUT 0x10
#define RFCOMM_FC_RTC_ON_OUTPUT 0x20
#define RFCOMM_FC_MASK 0x3F

#define RFCOMM_RPN_PM_BIT_RATE 0x0001
#define RFCOMM_RPN_PM_DATA_BITS 0x0002
#define RFCOMM_RPN_PM_STOP_BITS 0x0004
#define RFCOMM_RPN_PM_PARITY 0x0008
#define RFCOMM_RPN_PM_PARITY_TYPE 0x0010
#define RFCOMM_RPN_PM_XON_CHAR 0x0020
#define RFCOMM_RPN_PM_XOFF_CHAR 0x0040
#define RFCOMM_RPN_PM_XONXOFF_ON_INPUT 0x0100
#define RFCOMM_RPN_PM_XONXOFF_ON_OUTPUT 0x0200
#define RFCOMM_RPN_PM_RTR_ON_INPUT 0x0400
#define RFCOMM_RPN_PM_RTR_ON_OUTPUT 0x0800
#define RFCOMM_RPN_PM_RTC_ON_INPUT 0x1000
#define RFCOMM_RPN_PM_RTC_ON_OUTPUT 0x2000
#define RFCOMM_RPN_PM_MASK 0x3F7F

#define RFCOMM_RLS_ERROR 0x01
#define RFCOMM_RLS_OVERRUN 0x02
#define RFCOMM_RLS_PARITY 0x04
#define RFCOMM_RLS_FRAMING 0x08

/* Multiplexor channel uses DLCI 0 */
#define RFCOMM_MX_DLCI 0

/*
 * Define RFCOMM Multiplexer message types
*/
#define RFCOMM_MX_PN 0x80
#define RFCOMM_MX_PN_LEN 8

#define RFCOMM_MX_CLD 0xC0
#define RFCOMM_MX_CLD_LEN 0

#define RFCOMM_MX_TEST 0x20

#define RFCOMM_MX_FCON 0xA0
#define RFCOMM_MX_FCON_LEN 0

#define RFCOMM_MX_FCOFF 0x60
#define RFCOMM_MX_FCOFF_LEN 0

#define RFCOMM_MX_MSC 0xE0
#define RFCOMM_MX_MSC_LEN_NO_BREAK 2
#define RFCOMM_MX_MSC_LEN_WITH_BREAK 3

#define RFCOMM_MX_NSC 0x10
#define RFCOMM_MX_NSC_LEN 1

#define RFCOMM_MX_RPN 0x90
#define RFCOMM_MX_RPN_REQ_LEN 1
#define RFCOMM_MX_RPN_LEN 8

#define RFCOMM_MX_RLS 0x50
#define RFCOMM_MX_RLS_LEN 2
#endif
